Part 25

In the room where you kicked the door open, turn around and head up the first set of stairs.

Take cover (press the cover button to crouch behind walls or objects) behind the first pillar on your left and wait for a grenade to blow open the gate.

When Locusts come through, snipe or Lancer them. Use a shotgun if they get too close, or retreat to the water and take cover if desperate.

Wait for Locusts to approach or peek from cover; avoid their one-hit kill punches on Insane difficulty.

Explore the basement to find any remaining Locusts, as one may stay at its spawn point.

After the cutscene (a non-interactive cinematic the game plays automatically) following the door opening, head back upstairs.

In the hallway, watch out for two Wretches.

Take either path back, picking up any respawned Longshot ammo if needed, and eliminate the Locusts at the door.

Head upstairs for a Wretch fight.

To make the Wretch fight easier, go back to the room with the wheel used to open the basement gate.

Stand at the door and use your Gnasher shotgun to eliminate Wretches emerging from four holes in the room where you chainsawed the desk for the Cog Tag.

Once all Wretches are dead, the Locust guarding the door will open it. Snipe or use the Gnasher/Chainsaw on him.

Proceed through the hallways without surprises until you reach the main hall.

Head upstairs and to the right, towards Dom and Cole.

Snipe any outside Locusts if desired. An invincible Boomer will appear and blow the door open.

If using the Lancer on Casual: Take cover next to the door (not the one that was blown open) and use your shotgun or Lancer. Retreat if necessary.

If using the Lancer on Hardcore or Insane: Stay upstairs and pick off enemies from mid-distance, or take cover on the staircase pillars and shotgun them if they get close.

If using the Longshot on any difficulty: Take cover upstairs on a pillar or rafters and snipe enemies as they come through. Plenty of ammo is available upstairs, but watch out for Theron Guards.

If the Boomer is the last enemy, avoid using the shotgun due to close quarters. Lancer or snipe it before killing all other Grubs.

When you receive a radio transmission from Baird about more Locusts, load up on ammo and head downstairs.

A Locust will break open another door; eliminate it, preferably with the Chainsaw.

Go to the back of the house and try the locked door.

Head upstairs, dodge debris, and kick open the door at the end of the hallway.

Take cover behind a window and snipe enemies, or throw a grenade into the Emergence hole.

After clearing the enemies, shoot the planks holding the door below shut with your pistol.

Pick up ammo and return to the door, which should now be open.

Take cover and snipe the Locust with a magnum that enters.

Head inside the door the Locust emerged from.

On Casual or Hardcore: You have thirty seconds to reach the APC. The timer starts when the Emergence hole appears or one of the two Boomers is defeated. Run through either door and make a direct run for the APC. You can reach it before the Emergence hole appears.

On Insane: This section requires luck and skill. Head right and take cover. Sacrifice yourself once to estimate the Longshots needed to kill a Boomer.

Repeat the Boomer encounter, using one less bullet than estimated.

Get close to the halfway mark that triggers the Emergence hole and shotgun the Boomer.

Run along the cover on the right side towards the APC, which may require luck.

After reaching the APC and watching the cutscene, the rest of the level can be completed using the Longshot strategy.